Erosion and Sediment Pollution Control Program Manual.pdf

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Adapted from USDA - NRCS FIGURE 9.4 Riprap Apron Design, Maximum Tailwater Condition Not to be used for Box Culverts NOTE: Do not extrapolate 363-2134-008 / March 31, 2012 / Page 240
Determine whether maximum or minimum tailwater conditions exist at the outfall for the design discharge. Minimum tailwater exists when the depth of flow in the receiving watercourse, as calculated by Manning’s equation, is less than ½ the diameter of the discharge pipe, or where no channel or swale exists at the point of discharge. Where this condition exists, use Figure 9.3. If the resulting apron width is wider than the existing channel width and discharge is directly into a downslope channel, as in Standard Construction Detail #9-3, use the channel width as the width of the apron. Maximum tailwater exists when the depth of flow in the receiving watercourse, as calculated by Manning’s equation, is greater than ½ the diameter of the discharge pipe. Where this condition exists, use Figure 9.4. If the resulting apron width is wider than the existing channel width and discharge is directly into a downslope channel, as in Standard Construction Detail #9-3, use the channel width as the width of the apron. For less than full-pipe flow conditions, calculate anticipated velocity as described at the beginning of this chapter and adjust riprap size where necessary to comply with Table 6.6. Locate the design discharge along the bottom of Figure 9.3 or 9.4. Follow a vertical line to the point where it intersects the first curve corresponding to the diameter of the discharge pipe. From that point follow a horizontal line to the right to determine the minimum R-size of the riprap. Do not extrapolate the curve lines. Where flows fall below the curve for a specific size of pipe, use the minimum rock size and apron dimensions indicated at the lower ends of the curves for the proposed pipe size. Check Table 6.6 to make sure that the anticipated discharge velocity does not exceed the maximum permissible velocity for the size of riprap obtained in this step. If the anticipated discharge velocity exceeds the maximum permissible velocity, increase the size of the riprap to a size whose permissible velocity is not exceeded. Follow the same vertical line mentioned above to the point where it intersects the second curve corresponding to the diameter of the discharge pipe. From that point, follow a horizontal line to the left and read the minimum length of the apron (La) in feet. For minimum tailwater conditions, the apron width (W) may be calculated by the formula: W = 3Do + La where Do = Outlet pipe diameter La = Length of the apron For maximum tailwater conditions, the apron width (W) may be calculated by the formula: W = 3Do + 0.4 La Where the apron design width (W) exceeds the downstream watercourse bottom width and the apron is directly in line with the channel, the maximum width of the apron should be the channel width. Grouting of riprap is not recommended for most installations. Where riprap is grouted, the following applies: 1. Precautions must be taken to prevent uncured concrete from coming into contact with any surface waters. 2. Grout should be placed in a layer with thickness equivalent to the d50 stone size over the entire extent of the apron prior to rock placement. 3. After stone placement, void spaces should be filled with grout. 363-2134-008 / March 31, 2012 / Page 241
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EROSION AND SEDIMENT POLLUTION CONT
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FOREWORD The various Best Managemen
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TABLE OF CONTENTS Page Foreword ...
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Waterbars .........................
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Table Number Name Page 11.4 Recomme
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Figure Number Name Page 7.7 Graphic
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STANDARD CONSTRUCTION DETAILS Numbe
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CHECKLISTS, STANDARD E&S WORKSHEETS
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are cases where sheet flow has occu
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is replaced following earthmoving,
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CHAPTER 1 - REQUIRED E&S PLAN CONTE
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topography of the site should be in
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efore earth disturbance occurs with
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is classified as High Quality (HQ)
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install the proposed perimeter BMPs
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detail(s) for the specific BMP. In
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CHAPTER 3 - SITE ACCESS This chapte
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ROCK CONSTRUCTION ENTRANCE WITH WAS
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RUMBLE PAD Pre-constructed rumble p
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3 feet should be avoided wherever p
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WATERBAR - Sediment Removal Efficie
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BROAD-BASED DIP - Sediment Removal
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USDA Forest Service STANDARD CONSTR
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DITCH RELIEF CULVERT (Cross Drains)
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TURNOUT - Sediment Removal Efficien
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STANDARD CONSTRUCTION DETAIL #3-11
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3. Temporary bridges should be inst
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PA DEP STANDARD CONSTRUCTION DETAIL
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WETLAND CROSSING Wetland crossings
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Adapted from PA DEP GP-8 FIGURE 3.8
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FIGURE 3.10 Rigid or Flexible Pipe
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PA DEP FIGURE 3.12 In-stream Coffer
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EARTHWORK WITHIN LAKES AND PONDS NO
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FIGURE 3.15 Turbidity Barrier Insta
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DEWATERING WORK AREAS - Wherever wa
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(Additional Notes for Standard Cons
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SITE HOUSEKEEPING AND MATERIALS MAN
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Prefabricated Washout Containers Ca
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CHAPTER 4 - SEDIMENT BARRIERS AND F
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The maximum slope length above a co
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STANDARD CONSTRUCTION DETAIL #4-1 C
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COMPOST FILTER BERM - Sediment Remo
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Installation - Compost filter berms
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STANDARD CONSTRUCTION DETAIL # 4-4
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ROCK FILTER OUTLET - Sediment Remov
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York County Conservation District 3
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Wherever there is a break or change
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A chain link fence should be instal
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SEDIMENT FILTER LOG (FIBER LOG) - S
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WOOD CHIP FILTER BERM - Sediment Re
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STRAW BALE BARRIER - Sediment Remov
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NRCS FIGURE 4.4 Straw Bale Barrier
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A one foot thick layer of AASHTO #5
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The total width of the filter strip
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INLET FILTER BAG - Sediment Removal
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Adapted from Maine DEP Maximum drai
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TABLE 5.1 Pennsylvania Rainfall by
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LAND USE < 2% TABLE 5.2 Runoff Coef
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TR-55 Shallow Concentrated Flow Tha
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Figure 5.2 - RAINFALL REGION MAP A
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Figure 5.6 - RAINFALL REGION MAP E
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TABLE 5.6 5-Minute through 24-Hour
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TABLE 5.8 5-Minute through 24-Hour
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Drainage Area (A) - Determine the d
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Determination of Time of Concentrat
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CHAPTER 6 - RUNOFF CONVEYANCE BMPs
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DESIGN PROCEDURE 1. Calculate the r
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TABLE 6.3 Manning’s “n” for T
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National Technical Information Serv
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TABLE 6.6 Riprap Gradation, Filter
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TABLE 6.9 Recommended n Values to b
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TABLE 6.10 Maximum Permissible Velo
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It should be noted that Guernsey si
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Channel #1 (Diversion Channel) on W
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Channel #1 Segments “A” and “
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No more than one third of the shoot
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Stackhouse Bensinger, Inc. STANDARD
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Adapted from North Carolina DENR ST
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TEMPORARY SLOPE PIPE - Temporary sl
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BENCH - Benches (a.k.a. gradient te
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CHAPTER 7 - SEDIMENT BASINS DESIGN
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14. The discharge from a sediment b
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Adapted from VA SWCC PA DEP FIGURE
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Develop a Stage Storage Curve. Use
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Sediment shall be removed from the
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FIGURE 7.2 Skimmer Orifice Design C
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The principal spillway should be an
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Adapted from USDA, NRCS FIGURE 7.3
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H TABLE 7.3 - PIPE FLOW CAPACITY n
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TABLE 7.4 Concrete Base Requirement
Page 209 and 210: Embedded section of aluminum or alu
Page 211 and 212: Wherever total basin dewatering is
Page 213 and 214: PA DEP STANDARD CONSTRUCTION DETAIL
Page 215 and 216: Riprap at toe of embankment shall b
Page 217 and 218: Head TABLE 7.6 - GRASS-LINED EMERGE
Page 219 and 220: 4. Once the depth of flow through t
Page 223 and 224: Anti-seep Collar Wherever soils sus
Page 225 and 226: 4. The maximum spacing between coll
Page 227 and 228: Adapted from PennDOT RC-70 STANDARD
Page 229 and 230: FILTER DIAPHRAGM Filter diaphragms
Page 231 and 232: Sediment Storage Zone Dewatering Pr
Page 233 and 234: 4. Greater surface area increases t
Page 237 and 238: Barrel/Riser Sediment Trap - This d
Page 239 and 240: Accumulated sediment shall be remov
Page 243 and 244: Wherever total trap dewatering is r
Page 245 and 246: At a minimum, outlet protection sho
Page 249 and 250: CHAPTER 9 - OUTLET PROTECTION As a
Page 251 and 252: FIGURE 9.1 Velocity Adjustment Nomo
Page 253 and 254: endwall. For discharges directly in
Page 255 and 256: STANDARD CONSTRUCTION DETAIL # 9-2
Page 257 and 258: Adapted from USDA NRCS STANDARD CON
Page 259: Adapted from USDA - NRCS FIGURE 9.3
Page 263 and 264: Adapted from ScourStop FIGURE 9.5 T
Page 265 and 266: STILLING BASIN (Plunge Pool) - Stil
Page 267 and 268: Adapted from USDOT, FHWA HEC 14 FIG
Page 269 and 270: Using the pipe slope (V:H) determin
Page 271 and 272: ENERGY DISSIPATER Energy dissipater
Page 273 and 274: EARTHEN LEVEL SPREADER LOCATION - E
Page 275 and 276: STRUCTURAL LEVEL SPREADER LOCATION
Page 277 and 278: The E&S plan should include such in
Page 279 and 280: Wherever the slope parallels the ro
Page 281 and 282: VA SWCC FIGURE 11.1 Stair Step Grad
Page 283 and 284: TOPSOIL APPLICATION Graded areas sh
Page 285 and 286: Site conditions such as soil limita
Page 287 and 288: Species Warm-Season Grasses Deerton
Page 289 and 290: 6. Use only in extreme southeastern
Page 291 and 292: Synthetic binders, or chemical bind
Page 293 and 294: EROSION CONTROL BLANKETS - There ar
Page 295 and 296: HYDRAULICALLY APPLIED BLANKETS Hydr
Page 297 and 298: PAM Specifications Anionic PAM mixt
Page 299 and 300: Adapted from VA DSWC FIGURE 11.5 So
Page 301 and 302: City of Portland, BDS FIGURE 11.6 T
Page 303 and 304: CHAPTER 13 - UTILITY LINE PROJECTS
Page 305 and 306: more viable. HDD may be considered
Page 307 and 308: STANDARD CONSTRUCTION DETAIL #13-1
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PA DEP FIGURE 13.1 Waterbar Install
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The following points should be cons
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SKID ROADS AND SKID TRAILS The prim
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The diversion channel should have a
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PA Timber Harvesting Packet FIGURE
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CHAPTER 15 - STREAMBANK STABILIZATI
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Figure 15.1 Riprap Streambank Prote
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GABIONS and Reno mattress have been
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PA DEP FIGURE 15.4 Reno Mattress St
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Adapted from VA DSWC FIGURE 15.5 Gr
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MISCELLANEOUS HARD ARMOR TECHNIQUES
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Natural colonization by surrounding
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INSTALLATION GUIDELINES Prepare the
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Branchpacking is the alternating of
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Fabric encapsulated soil is often u
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Fiber rolls, or coir logs, are cyli
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CHAPTER 16 - GRADING STANDARDS PA D
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CHAPTER 17 - AREAS OF SPECIAL CONCE
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Adapted from USDA NRCS FIGURE 17.2
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Adapted from USDA NRCS FIGURE 17.4
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enter the Act 2 Program, which is a
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No RECOMMENDED PROCESS FOR SITES WI
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Common Contaminants of Concern: Two
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Structural (Stabilization) Erosion
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ii. The siting and function of any
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SPECIAL PROTECTION WATERSHEDS Sourc
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impacts, including suitability of g
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SLOPE FAILURES PA DEP The Problem I
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TABLE 17.1 PROCESSES LEADING TO LAN
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GEOTHERMAL WELL DRILLING Source Unk
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Well (or Total Well Field) Flows Gr
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Project: COMPLETE PLAN CHECKLIST A.
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STANDARD E&S CONTROL PLAN TECHNICAL
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“A maintenance program, which pro
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Complies Deficient N/A Hydric soils
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Complies Deficient N/A Removal of t
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Complies Deficient N/A Standard E&S
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Sediment Traps (Chapter 8) Complies
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Permanent Stabilization Topsoil rep
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APPENDIX B - STANDARD E&S WORKSHEET
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STANDARD E&S WORKSHEET #2 Compost F
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STANDARD E&S WORKSHEET # 4 Reinforc
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STANDARD E&S WORKSHEET # 6 Super Si
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STANDARD E&S WORKSHEET # 8 Rock Fil
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STANDARD E&S WORKSHEET # 10 Rationa
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STANDARD E&S WORKSHEET # 12 Sedimen
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E L E V A T I O N (FT) STANDARD E&S
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STANDARD E&S WORKSHEET # 16 Sedimen
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BASIN NO. TEMP. OR PERM. Y (FT) Z S
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STANDARD E&S WORKSHEET # 20 Riprap
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STANDARD E&S WORKSHEET # 22 PLAN PR
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15. Until the site is stabilized, a
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APPENDIX D - STANDARDS FOR MAPS AND
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PLAN DRAWINGS Each bit of informati
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e carefully preserved and stored fo
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SOIL NAME CUTBANKS CAVE CORROSIVE T
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ROUGHNESS ELEMENT DISSIPATER - This
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2. Determine Discharge Velocity (VO
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From Figure F.8, VA/VO = 1.05 VA =
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Yo / D FIGURE F.4 Dimensionless Rat
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USDOT, FHWA HEC 14 FIGURE F.6 Flow
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FIGURE F.8 Average Velocity in Abru
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FIGURE F.10 Average Depth for Abrup
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FIGURE F.12 Riprap Size for Use Dow
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EXAMPLE - Given: Circular Concrete
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USDOT, FHWA HEC 14 FIGURE F.14 Impa
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designed to discharge all anticipat
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Figure G.1. Convex Contours and Slo
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Figure G.2. Turf Reinforcement Mat
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c. For subsurface discharge level s
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asin/trap, it should be off-line du
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Design to Avoid Downstream Erosion
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Down Slope Ground Cover Table G.2.
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VIII. OUTFALL DESIGN As previously
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Figure G.10. Rill/Gully Repair Figu
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X. SELECTED REFERENCES Pennsylvania
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APPENDIX H - DUST CONTROL Descripti
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Table H.2. Adhesives Used for Dust
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Tree Health Preserving trees is not
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can have blocky aggregates. They ha
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Site Characteristics—Site charact
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Identify trees in need of care In t
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363-2134-008 / March 31, 2012 / Pag
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Use accurate information. The plan
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The transplanting process requires
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Protecting Trees During Constructio
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geotextile. The plastic core is mad
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Retain a qualified arborist to perf
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Repairing Construction Injury The m
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Tree Techniques Tree injury Tree li
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Improve the aeration and drainage o
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1995. Tree-Pruning Guidelines. (Gui
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APPENDIX J - Publication: “Unders
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ions such as calcium, magnesium, an
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Soil Structure Is Destroyed by Comp
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compaction in decent, fertile soils
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A Note on Organic Materials and Ame
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Final Strategies for Dealing with C
Page 515 and 516:
This publication is available from
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363-2134-008 / March 31, 2012 / Pag
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Aeration -----Mixing water with air
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Aquiclude -----A geologic formation
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Bedrock----- The more or less solid
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C-Horizon -----A layer of unconsoli
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Clay -----A fine-grained cohesive s
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Where: Q = Flow volume (cfs) V = Fl
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Cut and Cover -----A method of tren
Page 533 and 534:
Diabase -----A rock of basaltic com
Page 535 and 536:
E&S Plan -----Erosion and Sediment
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E&S Plan -----A site-specific plan
Page 539 and 540:
Filter Fabric Fence -----A sediment
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Frost Action (Soils) -----The likel
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Grade -----1. The slope of a road o
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Holding Structure -----Any excavati
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Inlet Protection -----Type of BMP u
Page 549 and 550:
Level Spreader -----An earthen or m
Page 551 and 552:
Mesic -----Refers to environmental
Page 553 and 554:
NOI -----Notice of Intent Nominal S
Page 555 and 556:
Organic Soil -----Soil composed pre
Page 557 and 558:
Percolation Test -----A measure of
Page 559 and 560:
Pollutant -----Any contaminant or o
Page 561 and 562:
Range -----The geographic region in
Page 563 and 564:
stabilization; cutting of existing
Page 565 and 566:
Section 404 ----The section of the
Page 567 and 568:
Slope Protection -----A layer or fa
Page 569 and 570:
Stable Channel Flow -----Channel fl
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stabilization techniques that consi
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Terrace -----An earthen embankment
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Trench Plug -----A flow obstruction
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Vernal Pool -----Wetlands that occu
Page 579 and 580:
Y Yellowboy -----Iron oxide deposit
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26. Filtrexx, Standard Specificatio
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86. USEPA, National Pollutant Disch
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